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Re : NIntegrate a list


Hello Aaron,

Don't mix up x and theta !

If you want to use NIntegrate, just use Evaluate :

In[9]:=
Integrate[x*Sin[x]*{1, 2}, {x, -Pi, Pi}]

Out[9]=
{2*Pi, 4*Pi}

In[12]:=
NIntegrate[Evaluate[x*Sin[x]*{1,2}],{x,-Pi,Pi}]

Out[12]=
{6.28319,12.5664}

Regards
 
F.Jaccard


-----Message d'origine-----
De : Aaron Fude [mailto:aaronfude at yahoo.com] 
Envoyé : vendredi, 17. décembre 2004 11:19
À : mathgroup at smc.vnet.net
Objet : [mg52940] NIntegrate a list

Hi,

I can Integrate this, but apparently not NIntegrate this:

Integrate[x*Sin[x]*{1, 2}, {theta, -Pi, Pi}]

but not

NIntegrate[x*Sin[x]*{1, 2}, {theta, -Pi, Pi}]

Is there a good way to do this (w/o writing loops)?

Many thanks!

Aaron Fude 


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